Providing up to 87 hours of advance warning (24.7 h average) before dangerous wildfire smoke arrives in your city. Powered by a 56-station operational network drawn from 479 stations analyzed across Canada and the U.S.
One monitoring network for early warning — positioned upstream of the cities that need it most.
Monitoring stations 100–650 km away detect smoke plumes hours before they reach major cities.
21 wildfire seasons of NAPS data (2003–2023) build correlation models between remote stations and city PM2.5 levels.
Color-coded health warnings trigger automatically when smoke is detected approaching your city.
Three complementary rules catch incoming wildfire smoke from any direction — each validated independently against 21 years of historical data.
Primary detection for nearby fires. Regression predicts city PM2.5 from each upstream station and alerts only when the prediction clears the health threshold.
Two-stage detection for distant NW fires. The Thunder Bay sentinel fires first; intermediate corridor stations then confirm smoke transport toward the city.
Eastern monitoring network — Montréal, Ottawa, Québec City, Cornwall and more — covering the corridor that carries Québec wildfire smoke toward Ontario.
Seven major Québec fires burned at once. Toronto reached a record 241 µg/m³ — and upstream stations flagged EXTREME conditions days ahead.
Illustrative Toronto profile; peak (241 µg/m³, Jun 28) and upstream alerts from project data.
Source: Bui & Zander (2026), “Before the Sky Turns Orange” — Toronto, June 2023 Québec wildfire event.
Predicted PM2.5 maps to a colour-coded health alert, each with a clear public-health action.
The C.L.E.A.R. methodology covers four major Canadian cities. Toronto is independently validated on the 2024 out-of-sample wildfire season.
Detection accuracy across the 2024 out-of-sample wildfire season (8 events) — with zero missed events (100% sensitivity).
Access real-time predictions for Toronto, Edmonton, Montréal, and Vancouver. Free and open source.
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